interlock


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interlock

a device, esp one operated electromechanically, used in a logic circuit or electrical safety system to prevent an activity being initiated unless preceded by certain events

Interlock

 

a set of methods and facilities that ensure holding the operating parts (components) of an apparatus, machine, or circuit (electrical) in a definite state which is maintained regardless of whether the interlocking action ceases. Interlocking increases the safety of service and the operating reliability of equipment, ensures the required operational sequence for mechanisms and components, and restricts the motions of mechanisms to the limits of the operating zone. The state (position) of operating parts in an object is held, depending on the operating principle of the interlocking device, by mechanical, magnetic, optical, or electrical means. Interlocking is discontinued by an action that returns the locked portions of an apparatus, machine, or circuit to the initial condition (before the interlocking) or permits a transition into another operating position by the presence of a corresponding signal. Interlocking can be achieved by manual, semiautomatic, and automatic means. In electrical equipment or in equipment having an electrical control, an interlock is set up to counter simultaneous actions or an incorrect sequence of connections or disconnections by interrupting the electrical power circuits; in machines with a hydraulic drive, an interlock shuts off the valves in the supply system; and so on. For example, in domestic gas hot water heaters there is an interlocking device that turns off the gas supply if the inflow of water is interrupted.

Interlocking is extensively employed in transportation, electric power stations and substations, industrial plants, computing equipment, and various production and domestic apparatus and devices.

I. E. DEKABRUN

interlock

[′in·tər‚läk]
(computer science)
A mechanism, implemented in hardware or software, to coordinate the activity of two or more processes within a computing system, and to ensure that one process has reached a suitable state such that the other may proceed.
(engineering)
A switch or other device that prevents activation of a piece of equipment when a protective door is open or some other hazard exists.

interlock

A device that prohibits an action from taking place.
References in periodicals archive ?
Information about the other ignition interlock manufacturers in Michigan is available on the Secretary of State website.
A recent report by the Centers for Disease Control and Prevention and the National Highway Traffic Safety Administration identified the following key actions states can take to increase the rate of interlock installations and to enforce their use.
has been estimated to dominate the North America ignition interlock devices market by 2015 end, and is expected to expand at CAGR of 6.
With regard to mechanical interlocks, this has resulted in a new breed of products that focus on the use of electro-mechanical and PLC-controlled cabinets.
The basic research findings regarding the interlock are well understood (Marques and Voas 2010):
HB 2117 would also increase to $275, up from $150, a fee that offenders in DUII diversion programs must pay to an independent alcohol and drug evaluation specialist responsible for monitoring offenders' interlock device installations.
In this type of interlocking, other reinforcement contingencies are involved directly in the selection of cultural practices, so it is important to understand the role of these contingencies in the maintenance of the behavior of the individuals which participate in the interlock.
In 32 cases (34%), the insider involved in the interlock is a CEO while the outsider involved in the interlock is a CEO in 37 of the interlocks (39.
Ignition interlock is an automobile technology, currently a breathalyzer, that prevents a vehicle's use if the driver's BAC is beyond a certain level.
The eGard interlock system requires an operator to turn and remove a key from the door to the enclosure.